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Step * of Lemma bnot-tt

∀[a:𝔹]. a ~ ff supposing ¬ba ~ tt
BY
{ ((D 0 THENA Auto) THEN AutoBoolCase ⌜a⌝⋅) }

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Latex:

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Latex:
\mforall{}[a:\mBbbB{}].  a  \msim{}  ff  supposing  \mneg{}\msubb{}a  \msim{}  tt


By

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Latex:
((D  0  THENA  Auto)  THEN  AutoBoolCase  \mkleeneopen{}a\mkleeneclose{}\mcdot{})

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